Lifestyle apparel group Guess Inc on Thursday posted a 13.5 per cent climb in September same-store sales.

The California-based company said total sales for the four weeks ended September 27 jumped 21.5 per cent to $32.2 million from $26.5m in the same period of last year.

It added total retail sales for the third quarter soared 20.5 per cent to $114.2m from $94.8m with quarterly same-store sales up 13.2 per cent year-on-year.